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If one angle of a triangle is 60° and th...

If one angle of a triangle is `60°` and the other two angles are in the ratio `1 : 2`, find the angles.

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NCERT EXEMPLAR-TRIANGLES-EXERCISE TRUE OR FALSE
  1. In ∆ ABC, DE || BC (Fig. 6.39). Find the values of x, y and z.

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  2. In Fig. 6.40, find the values of x, y and z.

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  3. If one angle of a triangle is 60° and the other two angles are in the ...

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  4. In ∆PQR, if 3∠P = 4∠Q = 6∠R, calculate the angles of the triangle.

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  5. In ∆DEF, ∠D = 60°, ∠E = 70° and the bisectors of ∠E and ∠F meet at O. ...

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  6. In Fig. 6.41, ∆PQR is right-angled at P. U and T are the points on lin...

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  7. In Fig. 6.44, if RP = RQ, find the value of x.

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  8. In Fig. 6.45, if ST = SU, then find the values of x and y.

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  9. Check whether the following measures (in cm) can be the sides of a rig...

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  10. Height of a pole is 8 m. Find the length of rope tied with its top fro...

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  11. In Fig. 6.46, if y is five times x, find the value of z.

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  12. The lengths of two sides of an isosceles triangle are 9 cm and 20 cm. ...

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  13. Without drawing the triangles write all six pairs of equal measures in...

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  14. ABC is an isosceles triangle with AB = AC and D is the mid-point of ba...

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  15. In Figure, it is given that LM = ON and NL = MO (a) State the three ...

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  16. Triangles DEF and LMN are both isosceles with DE = DF and LM = LN, res...

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  17. If ∆PQR and ∆SQR are both isosceles triangle on a common base QR such ...

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  18. State which of the following pairs of triangles are congruent. If yes...

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  19. State which of the following pairs of triangles are congruent. If yes...

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  20. In Figure, PQ = PS and ∠ 1 = ∠ 2. (i) Is ∆PQR ≅ ∆PSR? Give reaso...

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